<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul
          class="cart-list"
          v-for="cartInfo in cartInfoList"
          :key="cartInfo.id"
        >
          <li class="cart-list-con1">
            <input
              type="checkbox"
              :checked="cartInfo.isChecked === 1 ? true : false"
              @input="
                changeSingleChecked(
                  cartInfo.skuId,
                  cartInfo.isChecked === 1 ? 0 : 1
                )
              "
              name="chk_list"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cartInfo.imgUrl" />
            <div class="item-msg">
              {{ cartInfo.skuName }}
            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="updateSkuNum(cartInfo, -1)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cartInfo.skuNum"
              @change="changeSkuNum($event, cartInfo)"
              @focus="changeOldNum(cartInfo.skuNum)"
              minnum="1"
              class="itxt"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="updateSkuNum(cartInfo, 1)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cartInfo.skuNum * cartInfo.skuPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a
              href="#none"
              class="sindelet"
              @click="deleteSingle(cartInfo.skuId)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="allChecked" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteAll">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ allNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ allPrice }}</i>
        </div>
        <div class="sumbtn">
          <router-link class="sum-btn" to="trade">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
  import {
    reqShopCartList,
    reqCheckCart,
    reqDeleteCart,
    reqAllChecked,
    reqAddCartSuccess,
    reqDeleteAll,
  } from "@/api";
  import { Message } from "element-ui";
  export default {
    name: "ShopCart",
    data() {
      return {
        cartInfoList: [],
        oldNum: 1,
      };
    },
    mounted() {
      this.getShopCart();
    },
    methods: {
      // 1.获取购物车数据
      async getShopCart() {
        try {
          let res = await reqShopCartList();
          // console.log(res);
          this.cartInfoList = res[0]?.cartInfoList.map((item) => {
            item.isReq = false;
            return item;
          });
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },
      // 2.修改单个选中
      async changeSingleChecked(id, isChecked) {
        try {
          await reqCheckCart(id, isChecked);
          this.getShopCart();
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },
      // 3.删除单个
      async deleteSingle(skuId) {
        try {
          await reqDeleteCart(skuId);

          this.getShopCart();
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },

      //4. 点击按钮数量的改动
      async updateSkuNum(cartInfo, skuNum) {
        if (cartInfo.isReq) return;
        cartInfo.isReq = true;

        try {
          if (cartInfo.skuNum + skuNum <= 0) {
            return (cartInfo.isReq = false);
          }

          await reqAddCartSuccess(cartInfo.skuId, skuNum);

          await this.getShopCart();
          cartInfo.isReq = false;
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },
      // 5.批量删除
      async deleteAll() {
        const skuIdList = this.cartInfoList?.reduce((p, c) => {
          if (c.isChecked === 1) {
            p.push(c.skuId);
          }
          return p;
        }, []);

        try {
          await reqDeleteAll(skuIdList);
          // alert("批量删除成功");
          Message.success("批量删除成功");
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },
      // 6.直接修改数量的input值
      async changeSkuNum(e, cartInfo) {
        const reg = /^[0-9]+$/g;
        const value = e.target.value;
        if (!reg.test(value) || value <= 0) {
          e.target.value = this.oldNum;
          return;
        }

        const centerNum = e.target.value - cartInfo.skuNum;
        try {
          await reqAddCartSuccess(cartInfo.skuId, centerNum);
          await this.getShopCart();
          // alert("修改成功");
          Message.success("修改成功");
        } catch (err) {
          // alert(err.message);
          Message.error(err.message);
        }
      },
      // 7.修改旧值
      changeOldNum(skuNum) {
        this.oldNum = skuNum;
      },
    },
    computed: {
      // 全选
      allChecked: {
        get() {
          return this.cartInfoList?.every((item) => item.isChecked === 1);
        },

        async set(newVal) {
          try {
            const skuIdList = this.cartInfoList.map((item) => {
              return item.skuId;
            });

            await reqAllChecked(newVal ? 1 : 0, skuIdList);

            this.getShopCart();
          } catch (err) {
            // alert(err.message);
            Message.error(err.message);
          }
        },
      },
      // 选中的总数量
      allNum() {
        return this.cartInfoList?.reduce((p, c) => {
          if (c.isChecked === 1) {
            p += c.skuNum;
          }
          return p;
        }, 0);
      },
      // 总价格
      allPrice() {
        return this.cartInfoList?.reduce((p, c) => {
          if (c.isChecked === 1) {
            p += c.skuNum * c.skuPrice;
          }
          return p;
        }, 0);
      },
    },
  };
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        & > div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;
        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          & > li {
            float: left;
          }

          .cart-list-con1 {
            width: 4.1667%;
          }

          .cart-list-con2 {
            width: 25%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }

          .cart-list-con3 {
            width: 20.8333%;

            .item-txt {
              text-align: center;
            }
          }

          .cart-list-con4 {
            width: 12.5%;
          }

          .cart-list-con5 {
            width: 12.5%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 12.5%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 12.5%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>
